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Both use enzymes and digest within the body.
They got circular DNA. They also have 70s ribosomes.
they both grow. and, neither get their food by photosynthesis.
they are both Prokaryotes, Unicellular, and are either an Autotroph of a Heterotroph
The question is toxic to what. Not all chemicals which are toxic to humans are toxic to bacteria, and some chemicals which are toxic to bacteria are harmless to humans (which is why we can have antibiotics). There are chemicals (like Hydrogen Sulfide) which are very toxic to mammals that SOME bacteria eat as food. But there are other chemicals like chlorine which are toxic to both humans and bacteria. So the question does not have a simple answer.
Bacteria and humans are similar because they both require nutrients and they both are able reproduce.
Both use enzymes and digest within the body.
they both are germs
They got circular DNA. They also have 70s ribosomes.
Bats and humans are similar because they are both mammals. Both give birth to live young, have hair on their bodies, and are warm blooded.
Both humans and cows are mammals, so both have similar structural and functional anatomies that either require or necessitate similar amino acid chains.
Tryptophan induces the lac operon.
they look similar, they have similar DNA, they are both very ancient organisms, they both perform the same ecological function
Humans are closer to chimps since we are both primates.
they both grow. and, neither get their food by photosynthesis.
because they both get boners
They both reflect light.